Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

DOES NOT SHIFT TO 4GR DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	With the ignition switch at the ON position, does the gear position indicator light indication correspond to the selector lever position?	Yes	Go to the next step.
1		No	Go to NO.29 GEAR POSITION INDICATOR LIGHT DOES NOT ILLUMINATE IN M RANGE , or NO.30 GEAR POSITION INDICATOR LIGHT ILLUMINATES IN D RANGE OR P, N, R POSITIONS .
2	Inspect the voltages at the following TCM terminals. (See TCM INSPECTION .) Terminals 2J and 2N (TFT sensor) Are voltages normal?	Yes	Go to the next step.
2		No	Repair or replace any malfunctioning parts.
3	Disconnect the solenoid valve connector. Measure the resistance between terminals E and J at solenoid valve connector. (See SOLENOID VALVE INSPECTION .) Is the resistance normal?	Yes	Go to the next step.
3		No	Repair or replace any malfunctioning parts.
4	Disconnect the TCM connector. Is the resistance between ground terminal 2M or 2Q at the TCM connector and body ground 5.0 ohms or less ?	Yes	Go to the next step.
4		No	Repair open ground circuit. Reconnect the TCM.
5	Inspect the following valves. (See PCM INSPECTION .) (See TCM INSPECTION .) PCM PID (using WDS or equivalent): VSS TCM terminal voltage: 2K (VSS) Are they normal?	Yes	Overhaul the control valve body and repair or replace any malfunctioning parts. (See AUTOMATIC TRANSAXLE RC4A-EL - OVERHAUL .) If the problem remains, overhaul the transmission and repair or replace any malfunctioning parts. (See AUTOMATIC TRANSAXLE RC4A-EL - OVERHAUL .)
5		No	Repair or replace malfunctioning parts.
6	Verify the test results. If normal, return to the diagnostic index to service any additional symptoms. If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If the vehicle is repaired, troubleshooting completed. If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM. (See TCM REMOVAL/INSTALLATION .)